<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- <div class="box">
        <div class="an">1</div>
        <div>
            <div class="an">2</div>
            <div class="an">3</div>
        </div>
    </div> -->
    <div class="box">
        <div>1</div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
        <div>5</div>
        <div>6</div>
        <div>7</div>
        <div>8</div>
        <div>9</div>
    </div> 
</body>
<style>
    /* .box {
        height: 200px;
        background: skyblue;
        display: flex;
        justify-content: space-between;
        align-items: center
    }
    .box an:nth-of-type(2){
        display: flex;
        margin-left: 10px;
    }
    .box .an{
        width: 50px;
        height: 100px;
        background: pink; */
    /* } */
    .box{
        height: 200px;
        background: skyblue;
        display: flex;
        align-items: center;
    }
    .box div{
        width: 50px;
        height: 100px;
        background: pink;
        margin-right: 10px;
    }
    .box div:nth-of-type(3){
        margin-right: auto;
    }
    .box div:nth-of-type(6){
        margin-right: auto;
    }
</style>

</html>